Monkey Business (1931) is the third of the Marx Brothers' movies and the first not to be an adaptation of a Broadway show.
The film stars the four brothers: Groucho Marx, Chico Marx, Harpo Marx, and Zeppo Marx. It is directed by Norman Z. McLeod with screenplay by S. J. Perelman and Will B. Johnstone. The story takes place on an ocean liner crossing the Atlantic Ocean.
Chico performs the song "When I Take My Sugar to Tea" written by Sammy Fain, Irving Kahal and Pierre Norman, in his usual unique style. Harpo performs "I'm Daffy Over You" co-written by, of all people, Chico Marx.
http://www.imdb.com/title/tt0022158/
